中国物理B ›› 2025, Vol. 34 ›› Issue (8): 86302-086302.doi: 10.1088/1674-1056/adda0e
Lattice and phonon properties in semiconductors FeSb2 and RuSb2
Meng Zhang(张萌)1, Shengnan Dai(戴胜男)2,†, Ranran Zhang(张冉冉)3, Mingfang Shu(舒明方)1, Wei Xu(徐威)1, Jinfeng Zhu(朱金峰)1, Xianglin Liu(刘祥麟)4, Yixuan Luo(罗伊轩)4, Toru Ishigaki5, Bo Duan(段波)6, Yanfeng Guo(郭艳峰)4,7, Zhe Qu(屈哲)3, Jiong Yang(杨炯)2, and Jie Ma(马杰)1,‡
- 1 Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
2 Materials Genome Institute, Shanghai University, Shanghai 200444, China;
3 Anhui Key Laboratory of Low-Energy Quantum Materials and Devices, High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
4 School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
5 Neutron Industrial Application Promotion Center, Comprehensive Research Organization for Science and Society, Naka, Ibaraki 319-1106, Japan;
6 Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, School of Science, Wuhan University of Technology, Wuhan 430070, China;
7 ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China
Lattice and phonon properties in semiconductors FeSb2 and RuSb2
Meng Zhang(张萌)1, Shengnan Dai(戴胜男)2,†, Ranran Zhang(张冉冉)3, Mingfang Shu(舒明方)1, Wei Xu(徐威)1, Jinfeng Zhu(朱金峰)1, Xianglin Liu(刘祥麟)4, Yixuan Luo(罗伊轩)4, Toru Ishigaki5, Bo Duan(段波)6, Yanfeng Guo(郭艳峰)4,7, Zhe Qu(屈哲)3, Jiong Yang(杨炯)2, and Jie Ma(马杰)1,‡
- 1 Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
2 Materials Genome Institute, Shanghai University, Shanghai 200444, China;
3 Anhui Key Laboratory of Low-Energy Quantum Materials and Devices, High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
4 School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
5 Neutron Industrial Application Promotion Center, Comprehensive Research Organization for Science and Society, Naka, Ibaraki 319-1106, Japan;
6 Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, School of Science, Wuhan University of Technology, Wuhan 430070, China;
7 ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China
摘要： The family of transition-metal dipnictides, $MX_{2}$ ($M$: metal, $X$: N, P, As, Sb, and Bi), has emerged as an important quantum material system due to its unique physical properties, such as large magnetoresistance, colossal Seebeck coefficients, and Weyl semimetal characteristics. In order to study the $M$-site ions effect on the lattice structure and the related dynamics, we compared two isostructural compounds, FeSb$_{2}$ and RuSb$_{2}$. Neutron diffraction, specific heat, and Raman scattering spectra of RuSb$_{2}$ were measured. We found that the thermal expansion coefficients are isotropic for RuSb$_{2}$, in contrast to the anisotropic behavior reported previously in FeSb$_{2}$. Moreover, the specific heat of RuSb$_{2}$ shows a boson-like anomaly around 25 K. Four of the six predicted vibrational modes were identified by polarized Raman scattering spectra and successfully simulated by ab initio calculations. Meanwhile, the temperature-dependent linewidths reveal that phonon-phonon interactions might dominate above 50 K, while electron-phonon coupling remains relatively weak.
中图分类号: (Phonons in crystal lattices)
- 63.20.-e